添加一个以文件名作为目标的自定义命令 [英] adding a custom command with the file name as a target

问题描述

我想做一些类似 add_custom_command ，输出文件
name作为生成的makefile中的目标。有没有一个优雅的方式
这样做？

I'd like to do something like add_custom_command, with the output file name as a target in the generated makefile. Is there an elegant way of doing this?

我见过的所有例子（如 cmake faq re：latex ）使用 add_custom_command 来说明如何生成所需的输出文件，然后 add_custom_target 创建目标。例如：

All the examples I've seen (such as the cmake faq re: latex) use add_custom_command to tell how to generate the desired output file, and then add_custom_target to create a target. e.g.:

add_executable (hello hello.c)
add_custom_command(OUTPUT hello.bin
                   COMMAND objcopy --output-format=binary hello hello.bin
                   DEPENDS hello
                   COMMENT "objcopying hello to hello.bin")
add_custom_target(bin ALL DEPENDS hello.bin)

但是，生成的makefile中的目标名称是 bin $ b比 hello.bin 。是否有一种方法使 hello.bin 本身成为生成的makefile中的目标
？

However, the target name in the generated makefile is then bin rather than hello.bin. Is there a way to make hello.bin itself a target in the generated makefile?

解决方案我尝试不工作：

Some solutions I've tried that don't work:

• 更改为： add_custom_target（hello.bin ALL DEPENDS hello .bin）会导致makefile中的循环依赖。

• changing to: add_custom_target(hello.bin ALL DEPENDS hello.bin) results in a circular dependency in the makefile.

推荐答案

p>你可以通过生成你的hello.bin作为目标的副作用。而不是从objcopy生成hello.bin，您生成hello.tmp。然后作为副作用，你也复制hello.tmp到hello.bin。最后，你创建依赖于你的hello.tmp的假目标hello.bin。在代码中：

You could do it by generating your hello.bin as a side effect of a target. Instead of generating hello.bin from objcopy, you generate hello.tmp. Then as a side effect you also copy hello.tmp to hello.bin. Finally, you create the phony target hello.bin that depends on your hello.tmp. In code:

add_executable (hello hello.c)
add_custom_command(OUTPUT hello.tmp
                   COMMAND objcopy --output-format=binary hello hello.tmp
                   COMMAND ${CMAKE_COMMAND} -E copy hello.tmp hello.bin
                   DEPENDS hello
                   COMMENT "objcopying hello to hello.bin")
add_custom_target(hello.bin ALL DEPENDS hello.tmp)

问题是hello .bin在运行clean时不会被清除。要使其工作，请添加：

The problem with that is that hello.bin is not cleaned when you run clean. To get that working, add:

set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES hello.bin)

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